Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL0
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 190
NWS STORM PREDICTION CENTER NORMAN OK
805 AM EDT THU APR 26 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
FAR NORTH GEORGIA
WESTERN NORTH CAROLINA
UPSTATE SOUTH CAROLINA
SOUTHEAST TENNESSEE
FAR SOUTHWEST VIRGINIA
EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 805 AM UNTIL
100 PM EDT.
HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
STATUTE MILES EAST AND WEST OF A LINE FROM 75 MILES EAST
NORTHEAST OF BRISTOL TENNESSEE TO 110 MILES WEST SOUTHWEST OF
ASHEVILLE NORTH CAROLINA. FOR A COMPLETE DEPICTION OF THE WATCH
SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
OTHER WATCH INFORMATION...CONTINUE...WW 188...WW 189...
DISCUSSION...A LONG-LIVED/FAST MOVING MCS WILL CONTINUE TO QUICKLY
APPROACH/MOVE ACROSS THE SOUTHERN APPALACHIANS REGION THIS MORNING.
EVEN WHILE INSTABILITY FEEDING INTO THE MCS WILL BE TEMPERED AS IT
APPROACHES THE MOUNTAINS...THE WELL-ORGANIZED/FAST MOVING NATURE OF
THE MCS WILL LIKELY MAINTAIN AT LEAST AN ISOLATED DAMAGING
WIND/SEVERE HAIL THREAT ACROSS THE REGION THIS MORNING.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION
VECTOR 31045.
...GUYER/MEAD
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW0
WW 190 SEVERE TSTM GA NC SC TN VA 261205Z - 261700Z
AXIS..60 STATUTE MILES EAST AND WEST OF LINE..
75ENE TRI/BRISTOL TN/ - 110WSW AVL/ASHEVILLE NC/
..AVIATION COORDS.. 50NM E/W /24WSW PSK - 41ESE GQO/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 31045.
LAT...LON 36868005 34798327 34798540 36868223
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 190 Status Report Messages:
STATUS REPORT #2 ON WW 190
VALID 261445Z - 261540Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 65 ESE CHA
TO 60 SSE TYS TO 35 NNW AND.
..GRAMS..04/26/12
ATTN...WFO...FFC...GSP...RNK...MRX...
&&
STATUS REPORT FOR WS 190
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
GAC137-187-241-257-281-311-261540-
GA
. GEORGIA COUNTIES INCLUDED ARE
HABERSHAM LUMPKIN RABUN
STEPHENS TOWNS WHITE
$$
SCC073-077-261540-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
OCONEE PICKENS
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 190
VALID 261345Z - 261440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 SW TYS TO
10 SE AVL TO 30 N HKY TO 30 S BLF.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 590.
..GRAMS..04/26/12
ATTN...WFO...FFC...GSP...RNK...MRX...
&&
STATUS REPORT FOR WS 190
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
GAC047-083-111-123-137-187-213-241-257-281-291-295-311-313-
261440-
GA
. GEORGIA COUNTIES INCLUDED ARE
CATOOSA DADE FANNIN
GILMER HABERSHAM LUMPKIN
MURRAY RABUN STEPHENS
TOWNS UNION WALKER
WHITE WHITFIELD
$$
NCC003-005-009-023-027-035-039-043-045-071-075-089-097-099-109-
113-149-161-171-175-189-193-261440-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
ALEXANDER ALLEGHANY ASHE
BURKE CALDWELL CATAWBA
CHEROKEE CLAY CLEVELAND
GASTON GRAHAM HENDERSON
IREDELL JACKSON LINCOLN
MACON POLK RUTHERFORD
SURRY TRANSYLVANIA WATAUGA
WILKES
$$
SCC073-077-261440-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
OCONEE PICKENS
$$
TNC011-065-139-261440-
TN
. TENNESSEE COUNTIES INCLUDED ARE
BRADLEY HAMILTON POLK
$$
VAC077-261440-
VA
. VIRGINIA COUNTIES INCLUDED ARE
GRAYSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (10%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (5%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (30%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (30%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Low (<5%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
Mod (60%)
|
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The "Low" category contains probability values ranging from less than 2%
to 20% (F2-F5 tornadoes), less than 5% to 20% (all other probabilities),
"Moderate" from 30% to 60%, and "High" from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.